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In this math activity, learners play a game and use a variety of strategies to solve a hidden number problem (or missing factor). Learners practice their number and operations skills.

In this activity, learners construct paper airplanes that twist and turn.

In this math activity, learners use problem solving skills to find a middle seat for Mary at the movies. Learners practice dividing numbers and identifying the middle of a quantity.

Things that are different sizes and stiffness vibrate differently, and in this Exploratorium Science Snack, you'll see how rings of various diameters react to vibration and external forces.

In this online version of the classic paper and pencil game, learners practice looking ahead to anticipate an opponent's move.

This activity is designed to accompany the PBS documentary about African-American chemist "Percy Julian: Forgotten Genius." Learners look through two cups with small holes in them to simulate what it'

Learners discover that their breath contains carbon dioxide, one of the pollutants found in car exhaust.

This activity about cryptographic techniques illustrates a situation where information is shared, and yet none of it is revealed.

In this activity, learners can play two card games related to endangered species, specifically North American amphibians.

In this math activity, learners practice comparing fractions.

Do you have an extra portable cassette tape player hanging around?

In this math activity, learners find patterns in telephone numbers.

In this game, learners strategize to be the first player to make three in a row.

In this activity, learners find as many combinations of a hundred as they can using various puzzle pieces from a hundred square grid paper.